Abstract

The reception and perception of the Indonesian society onradio technology in the early period of the appearance of thistechnology in the former Netherlands East Indies can of course betraced in its diverse culture texts, including the literary texts. Eventhough such technological invention as radio is an element that isquite apparent and give colour in many modern Indonesian literarytexts, this element has not seemed to attract the attention of scholarsof Indonesian literary studies. This paper looks at the images of radiotechnology in modern Indonesian literary texts by examining how thistechnology is represented as a matter of course in early modernIndonesian literary works. Two works which will be investigated in thisarticle are Muhammad Dimyati’s Dibalik Tabir Gelombang Radio(1940) and A. Damhoeri’s Zender Nirom (1940). In this paper, Idiscuss them in terms of the explicit presence of radio as an urbanicon and symbol of modernity.

Abstract

The objective of the research was to study the influence of grass to oil palm frond substitution on the digestibility and fermentability in vitro gas tehniques. The research used arranged in a randomized complete design with 5 treatments and 4 replication. The treatments that was substitution of the grass to oil palm frond at level : 0, 25, 50, 75 and 100% in ration. The result of the sudy showed that substitution of the grass to oil palm frond was significantly different (P < 0.05) on the digestibility of dry matter but not significantly different (P > 0.05) on the digestibility of organic matter, acid degreeand gas production. It could be concluded that the used of grass to oil palm frond substitution at the level 25% had better the digestibility and fermentability compared to other treatments.

Abstract

The objective of the research was to study the influence of sengon leaf supplementation on the digestibility and fermentability of urea treated bagasse using with in vitro technique. The matter were used in the research was the bagasse-urea treated which had good degradation characteristic which origin from the first research. Completely randomized design with five treatments of 0%, 5%, 10%, 15% and 20% sengon leaf supplementation and four replications were used in this experiments. Parameter measured were the dry metter and organic matter digestibility, acidity degree, ammonia (N-NH3) and VFA production of in vitro test. The result showed that the sengon leaf supplementation was significant effect (P>0.05) on the digestibility and fermentability bagasse-urea treated with in vitro technique. It could be concluded that bagasse treated of 6% urea solution that used in the second step research could be increased their digestibility and fermentability by supplementation of 10% sengon leaf.

Abstract

The aim of this study was to investigate the influence of table salt and nitrogen fertilizer on dry matter production and in sacco digestibility of guinea grass (Panicum Maximum JACQ). The research had been conducted in field and at barn. The study was done in two phases, the dry matter production of guinea grass and test of the guinea grass digestibility. Completed bifactorial treatments of table salt (0; 15 and 30 g NaCl) and nitrogen fertilizer (0; 7,36 and 14,72 g N) were studied in the experiment using block randomized design with three replications. Table salt solution was poured to the soil surface 10 days after planting. The test of guinea grass digestibility was by using nylonbag on thr rumen catle fistula. The result of the experiment showed that the used of table salt, nitrogen fertilizer and interaction between table salt with nitrogen fertilizer were not significantly influence (P > 0,05) on the dry matter production, the digestibility dry matter, organic matter and crude fiber of theguinea grass. The digestibility of crude protein of guinea grass was not significantly affected (P > 0,05) by addition of table salt, but the highly significantly affected (P < 0,01) by addition of nitrogen fertilizer.

Abstract

Traffic light still uses analog system with discrete component. This technology has many disadvantages for example difficulty in maintenance and repair, display only to lamp without counter and no control for delay in normal hours or rush hours. These can because traffic jam and accident. To solve this problem, traffic light system is completed by digital system and buzzer using microcontroller AT89C51. The observation result to prototype at laboratory in Polytechnic State of Padang show this system can be implemented to real condition.

Abstract

PREPARATION AND CHARACTERIZATION OF TRANSPARENT CONDUCTIVE ZnO THIN FILMS BY DC MAGNETRON SPUTTERING. Transparent and conductive aluminium-doped zinc oxide thin films have been prepared by dc magnetron sputtering using targets composed of ZnO and Al2O3. Polycrystalline ZnO:Al films were deposited onto a heated glass substrate. The surface morphology and crystalline structure, as well as optical and electrical properties of the deposited films were found to depend directly on substrate temperature. From optical and electrical analysis were observed that the optical transmittance and conductivity of the ZnO:Al transparent conductive oxide films increased when deposition temperature was raised from 200 to 400 oC. Films grown on 300 oC substrates showed a high conductivity value of 0.2 x 102 -1cm-1 and a visible transmission of about 85%. The growth temperatures of 300 oC, aluminium doping levels of 0.9 wt.% were preferable to achieve ZnO:Al films with optical and structural qualities as required for solar cell applications.